Julianna Margulies (born June 8, 1966) is an American film and television actress, best known for her role on ER, for which she won an Emmy Award, and The Good Wife, for which she won a Golden Globe, two Emmy and two Screen Actors Guild Awards. Julianna Margulies (born June 8, 1966) is an American film and television actress, best known for her role on ER, for which she won an Emmy Award, and The Good Wife, for which she won a Golden Globe, two Emmy and two Screen Actors Guild Awards.